Diamond power



Aug. 31', 1926. 1,598,012

. G. l. RAWSON I DRAIN VALVE FOR BOILER CLEANERS Filed March '7. 1921 2Sheets-Sheet 1 w I ,I) 1/ x a INVENTOR.

ga a ff 64/4 544 Aug. 31, 1926., 1 1,598,012

G. I: RAWSON 1 DRAIN. VALVE FOR BOILER CLEANERS Filed March 7, 1921 ZSheetS-Sheet 2 17 x 19 .1 I I ii lHHli l f 21 I? INVENTOR. few/Y7 f 59W54 A TTORNE Y.

iii

Patented Aug. 31, 192%.

U i T T.

GRANT I. RAVTSON, OF DETROIT, MICHIGAN, ASSIG-NOR, BY MESNE ASSIGNMENTS,TO DIAMOND POWER SPECIALTY CORPORATIQN, F EETROIT, MICHIGAN, A IGORPOEA"TION OF MICHIGAN.

DRAIN VALVE FOB BOILER CLEANERS.

The invention relates to new and useful improvements in a drain valvefor boiler cleaners adapted for use particularly with those boilercleaners in which steam is ejected from blower units for cleaning thesoot and ashes from boiler tubes.

An object of the'invention is to provide, in connection with boilercleaners of this class, a simple and effective means of insuring thedraining of the pipes connected with the boiler cleaner previous to theblowing operation.

Another object is the provision of thermostatic means for opening andclosing the drain valve.

Another object is the provision, in connection with a boiler cleaner ofthis class, of means for employing the liquid contained in the piping ofthe blower system for opening a drain valve. 1 i

. Other objects will appear hereinafter.

The invention consists of the combinations and arrangements of partshereinafter .described and claimed.

The invention will be best understood by reference to the accompanyingdrawings, which form a part of this specification and in which,

Fig. 1 is an elevational view of the inven- 7 tion,

In boiler cleaners in the class with which i the invention is adaptablefor use, a header 7 communicates with a suitable source of steam supply.Connected to this header and communicating with the blower units, whichare positioned within the settings of the boiler, are delivery pipes 8,each out which communicates with its respective blower unit. Positionedin each of the'pipes 8 is a suitable valve 9 for controlling thedelivery of the cleaning fluid or steam to the blower unit. l/Vhen it isdesired to clean the boiler, steam is delivered to the header 7 As eachunit is called into operation there is a respective control valve 9opened to deliver steam to the unit. blowing process, these valves areclosed as is likewise the valve which controls the delivery of stea'm tothe header 7 The'steam which is remaining in the header 7 and the pipesconnecting therewith, between blowing periods, condenses to form liquid,When After the 1 Application filed March 7, 1921. fierial No. 450,413.

the next blowing. period arrives, unless this liquid is. first removedfrom the. pipes, the same will be discharged against the boiler tubes,thereby serving to Jcakethesoot and ashes uponthe tubes. To eliminatethis difficulty and to insure the removal of all the liquid from thepipes before the blowing process takes place, I have provided a. noveldrainvalve, which will be automatic in its action.

Communicating with the header 7 a drain pipe 10, which is connected by asuitis formed preferably of copper or some other.

material which has a high co-efficient of expansion. This pipe passesthrough an opening formed in the leg 13 so as to permit slidablemovement of the pipe 15 in this opening. This pipe connected by'suitablepiping so as to serve as a drain pipe for the header 7 and the connectedpipes. Interpositioned in these connecting pipes is a valve 16, thevalve stem 23 of which projects into a housing 18. This housing 18 isprovided with a suitable cap 19, which is secured to the body of "thehousing by suitable bolts. Positioned in the housing 18 and rigidlyattached to the valve stem 23, adjacent its upper end, is a piston 20,which is provided on its periphery with suitable sacking or piston rings21. Communicating with the header 7 is a pipe 17, which communicatesthrough the cap 19 with the interior of housing 18. Positioned withinthe housing 18 and embracing the valve stem 23 is a spiral spring 22,one end of which engages the lower portion of housing 18 and the otherend of which engages the piston 20, thereby serving to maintain thepiston 20 positioned adjacent theupper end of the housing 18. Whenthepiston '20 is at the position shown in Figure 2, the valve 16 is inopen position. In order to close the valve 16, it is necessary to movethe valve stem downward relative to the housing 18.

' Consequently, since the piston 20 is rigidly attached to the valvestem, the spiral spring "22 will. be incompressed position when thevalve is closed. Gonnnunicating with the interior of housing 18 is apipe 2 1, which,

communicates with the pipe 17, a valve 25 (not shown) beinginterpositioned in the pipe 2 1. A pipe 26 serves to form communicationbetween the pipe 2 1; and a valve 27 (not shown).

Pivot-ally mounted on base 14; is an arm 28, which is pivotallyconnected by an arm 29 to a collar 30, which is'rigidly fastened uponthe pipe 15. A suitable turnbuckle 31 is interpositioned in the arm, 29for the purpose of adjustingthe length of said arm.

When it is desired to cleanthe boilers, the steam is first turnedintothe header 7.. Any liquid which has accumulatedin the header 7willbeforced'through the pipe 15. lVhen the liquid strikes the pipe 15,a cooling of the same takes place with a quick contraction thereof. Asthe steam flows into the header 7, also passes through the pipe 17 andinto the housing 18, thus forcing the valve 16' into closed position bymoving the piston 29, downwardly in the housing 18.

'It is to be noted that a bleed passage is formed in the piston20toprevent too rapid movement of the same when the steam enters the housing18 Upon the contraction of the pipe15, the arm28 is caused to swing'sothat the free end thereof forces the valve stem 32 inwardly, therebyopening the valve and permitting the flow of steam through the pipe 24into the housing 18. As'soon asthe steam is permitted to enter thehousing 18 through the'pipe 2 1, the

; steam pressure at opposite sides of the piston 20 becomes equalizedand the piston 20 moves upwardly relativeto the housing 18 in response'to th-e'pres'sure of the spring 22, thereby opening the valve 16.The liquid, which has flowed into the pipe 15, is thereby permitted toescapethrough the drain pipe 12. Followingthe liquid its flow throughpipe 15 is the steamwhich has been turned into the header When thissteam passes into the pipe 15, an expansion of the pipe takes place witha consequential swinging of the arm 2S in the opposite direction toengage the valve stemj33, causing the same to open the exhaust valve 27;YVhen the arm 28 disengages from the member 32, a springlnot shown)causes the valve25 to close vTheflow of the steam, therefore, isprevented from entering the housing 18 through the piping 2 1 and thedisc 20 is forced downwardly so that the valve 16 closes. The steam,which has been delive fed tothe housing 18through thepiping 26:, ispermitted-to; escapethrough the pipe 241 and. the exh aust valve 27'. Inorder" to regulate the distancebf movement of the piston 2Q, anadjusting screw is'threaded into the cap 19,as'.wi1l 'bfe readilyl'understp d In /ea s ed t a e've t a andawe suppo te y ae ablesap-porring -me bsrf3 which: een??? t h ling theoperationofsaiddrainvalve; and

thermostatic means for regulating the operation of said auxiliary valve.

2. i In a drain system for boiler cleaners, a drain valve'; an auXiliarymember for controlling the operation ofv said drain valve;

.a'n expansible and contractile member; and

means cooperating with said eXpansible and extractile member foroperating saidauxiliary member.

3. Ina drain system for boiler cleaners, a drain valve; an expansibleand contractile member; a pivotally mounted member connected to saidexpansible member; and means operable by said pivotally mounted memberfor controlling-the opening and closing said valve.

{1. In a' boiler -cleaner drain system, a drain valve; an expansibleandcontractile member; a pivotally mounted member connected to saidexpansible and contractile member; means operatively connected to saiddrain valve for opening and closing the same and means operable by said'pivotally mounted member'for controlling the opera tion of said openingand closing means.

' 5. In a drain system for boiler cleaners, a drainvalve;,an eXpansibleand contractile member; a pivotally mounted arm connected to said,eXpansible member; means for opening and closing said valve; means fordelivering a fluid to said opening and closing means; andmeans, operablebysaid arm, for controlling the delivery of fluid to said openingand'closing means by the fluid delivdrain valve, fluidoperatedcontrolmeans for h said valve, and thermostatic means for controllingthe operation ofsaid fluid operated means.

7. In a drain system for boiler cleaners, a drain valve, means forcontrolling the application of fluid pressure to shift said'valve, adrain pipe controlled by sa'id'valve, and means operable by temperaturevariations in saidf i eco trolling the operation of the firstnamedfmeansfor causing the shifting of'saidy'a'lve;

Inadra in system for boiler cleaners, a drain 'valye, an exp-'ansiblejand contractile pipe f rmin a? raina e Pa -see i st se ns n i an m 2mQ esaid i pipe for controlling the operation of said valve and eifeoting arelatively large travel of the valve for a given expansion orcontraction of said pipe.

9. In a drain system for boiler cleaners, a drain valve, fluid operablecontrol means for said valve, a pipe in open communication with thedrain system for applying fluid pressure to said valve tending to closethe same, an auxiliary valve for controlling an application of fluidforce to said valve for opening the same, and thermostatic control meansfor said auxiliary valve.

GRANT I. RAWSON.

